Screwdriver assembly



FIG. 1 is a perspective view of a screwdriver assembly, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view showing the claimed design with an upper cap removed, wherein the broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a screwdriver assembly, as shown and described. 